As you could expect from a ghost town, the atmosphere is somewhat dead. It clearly is a monument and not a place where people live (or even have been living). Only the big Mosque with the tombs of saints is regularly visited by pilgrims.
Fatehpur Sikri is located only 40 kilometers distance from Agra, the city of the Taj Mahal and the Red Fort. When you are in the area, Fatehpur deserves a visit of a few hours. But beware: it can get terribly hot there.